Player Page

Grobbelaar, M (Mari)
Dob: 2016/04/20 (U10)
Gender: Female
Chess SA id: 2160158380
FIDE id:
Region: Tshwane (GTP)
Citizen: RSA
Title(s):
Last active: 2024/06/01 (17 days ago)
Ratings
Raw rating=Current rating, Weighted rating (WR)=Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Current Raw rating1309.9
Current Weighted rating1291.1
Current Weighted performance1224.5
Current official/published rating (highest between Raw, WR and WP)1309.9
Current highest rating achieved1359.2
Current floor (min rating allowed)859.2
Current K-factor36
Games played this month5
Score (S)2.0
Expected score (We)3.55
Difference (S-We)-1.29
Current Raw change (no limits, including tournament time weight)-46.3
Current min/max change allowed (with limits)±141.8
Current Raw change used (final)-46.3
Projected new Raw rating1263.6
Projected new Weighed rating1190.4
Projected new Weighted performance1159.2
Projected new final Raw rating (if new WP > new Raw)1263.6
Projected new highest rating1359.2
Projected new floor859.2
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1263.6
Projected effective change (new Official - current Official)-46.3
Raw rating=Current rating, Weighted rating (WR)=Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Current Raw rating1296.6
Current Weighted rating1285.3
Current Weighted performance1224.5
Current official/published rating (highest between Raw, WR and WP)1296.6
Current highest rating achieved1351.7
Current floor (min rating allowed)851.7
Current K-factor36
Games played this month5
Score (S)2.0
Expected score (We)3.55
Difference (S-We)-1.55
Current Raw change (no limits, including tournament time weight)-55.8
Current min/max change allowed (with limits)±144.5
Current Raw change used (final)-55.8
Projected new Raw rating1240.8
Projected new Weighed rating1184.9
Projected new Weighted performance1159.2
Projected new final Raw rating (if new WP > new Raw)1240.8
Projected new highest rating1351.7
Projected new floor851.7
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1240.8
Projected effective change (new Official - current Official)-55.8
s
Raw rating=Current rating, Weighted rating (WR)=Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Current Raw rating1255.4
Current Weighted rating1236.0
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1255.4
Current highest rating achieved1255.4
Current floor (min rating allowed)755.4
Current K-factor36
Games played this month0
Score (S)0.0
Expected score (We)0.00
Difference (S-We)0.00
Current Raw change (no limits, including tournament time weight)0.0
Current min/max change allowed (with limits)±153.2
Current Raw change used (final)0.0
Projected new Raw rating1255.4
Projected new Weighed rating1138.2
Projected new Weighted performance434.5
Projected new final Raw rating (if new WP > new Raw)1255.4
Projected new highest rating1255.4
Projected new floor755.4
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1255.4
Projected effective change (new Official - current Official)=0.0
Raw rating=Current rating, Weighted rating (WR)=Weighted average of current/new Raw rating + last 23 published Raw ratings), Weighted performance (WP)=Weighted average of last 5 tournaments
Current Raw rating1200.0
Current Weighted rating1200.0
Current Weighted performance
Current official/published rating (highest between Raw, WR and WP)1200.0
Current highest rating achieved1200.0
Current floor (min rating allowed)700.0
Current K-factor36
Games played this month0
Score (S)0.0
Expected score (We)0.00
Difference (S-We)0.00
Current Raw change (no limits, including tournament time weight)0.0
Current min/max change allowed (with limits)±165.8
Current Raw change used (final)0.0
Projected new Raw rating1200.0
Projected new Weighed rating1104.0
Projected new Weighted performance
Projected new final Raw rating (if new WP > new Raw)
Projected new highest rating1200.0
Projected new floor700.0
Projected new K-facor36
Projected new official/published rating (highest between new Raw, new WR and new WP)1200.0
Projected effective change (new Official - current Official)=0.0
Tournaments
Tournament: 2024 Johannes Mabusela's 40th Birthday Chess Tournament F Section (D)
Start: 2024/06/01  End: 2024/06/01  Host: GTP  Type: Standard   Time: 60  Time weight: 0.83  Rounds: 5
Games: 5  Score: 2.0
Main rating: 1309.9  Rating gain/loss: -46.3
Type rating: 1296.6  Rating gain/loss: -55.8
Analysis
#TournamentStartEndHostTypeTimeWeightRnsGmsScrMainTypeAnalysis
7 2024 Johannes Mabusela's 40th Birthday Chess Tournament F Section (D) 2024/06/01 2024/06/01 Tshwane (GTP) Standard 60 0.83 5 5 2.0 1309.9 1296.6 Analysis
6 2024 Tshwane South School District CLOSED Individual Championships (U11 Girls) 2024/05/11 2024/05/11 Tshwane (GTP) Standard 60 0.83 5 5 2.0 1334.2 1325.4 Analysis
5 South African Junior Closed Chess Championship 2024 (U8 Girls) 2024/04/27 2024/05/01 Ekurhuleni (GE) Standard 120 1.00 9 9 6.0 1334.2 1325.4 Analysis
4 2024 Lubowski Open Chess Tournament (D2) 2024/03/23 2024/03/24 Tshwane (GTP) Standard 90 0.94 5 5 3.0 1353.8 1344.5 Analysis
3 2024 Constantiapark Open (E) 2024/02/17 2024/02/17 Tshwane (GTP) Standard 60 0.83 5 5 3.0 1359.2 1351.7 Analysis
2 2024 Tshwane Chess OPEN Registration Tournament (E) 2024/01/27 2024/01/27 Tshwane (GTP) Standard 60 0.83 5 5 3.5 1353.2 1344.4 Analysis
1 2024 Gauteng Inter-Region Chess Championship (U8+U10 Girls) 2024/01/13 2024/01/14 Tshwane (GTP) Standard 90 0.94 5 4 3.0 1353.2 1344.4 Analysis
#TournamentStartEndHostTypeTimeWeightRoundsGamesScoreMainTypeAnalysis
14 2024 Johannes Mabusela's 40th Birthday Chess Tournament F Section (D) 2024/06/01 2024/06/01 Tshwane (GTP) Standard 60 0.83 5 5 2.0 1309.9 1296.6 Analysis
13 2024 Tshwane South School District CLOSED Individual Championships (U11 Girls) 2024/05/11 2024/05/11 Tshwane (GTP) Standard 60 0.83 5 5 2.0 1334.2 1325.4 Analysis
12 South African Junior Closed Chess Championship 2024 (U8 Girls) 2024/04/27 2024/05/01 Ekurhuleni (GE) Standard 120 1.00 9 9 6.0 1334.2 1325.4 Analysis
11 2024 Lubowski Open Chess Tournament (D2) 2024/03/23 2024/03/24 Tshwane (GTP) Standard 90 0.94 5 5 3.0 1353.8 1344.5 Analysis
10 2024 Constantiapark Open (E) 2024/02/17 2024/02/17 Tshwane (GTP) Standard 60 0.83 5 5 3.0 1359.2 1351.7 Analysis
9 2024 Tshwane Chess OPEN Registration Tournament (E) 2024/01/27 2024/01/27 Tshwane (GTP) Standard 60 0.83 5 5 3.5 1353.2 1344.4 Analysis
8 2024 Gauteng Inter-Region Chess Championship (U8+U10 Girls) 2024/01/13 2024/01/14 Tshwane (GTP) Standard 90 0.94 5 4 3.0 1353.2 1344.4 Analysis
7 Lardies Open Tournament 2023 (F) 2023/10/28 2023/10/28 Tshwane (GTP) Standard 60 0.83 5 5 3.0 1251.6 1231.7 Analysis
6 2023 Gauteng Noord (F) 2023/10/14 2023/10/14 Tshwane (GTP) Standard 90 0.94 6 6 6.0 1251.6 1231.7 Analysis
5 2023 Centurion Chess Open (E) 2023/09/23 2023/09/23 Tshwane (GTP) Standard 60 0.83 5 5 2.0 1234.8 1246.8 Analysis
4 2023 U8 Open Chess Tournament 2023/09/02 2023/09/02 Tshwane (GTP) Rapid 30 0.60 5 5 4.0 1234.8 1200.0 Analysis
3 2023 Etienne Lewis Closed Tournament (U8) 2023/08/26 2023/08/26 Tshwane (GTP) Standard 90 0.94 6 5 2.0 1219.1 1224.1 Analysis
2 2023 Woman's Day Open Chess Tournament (Pawn) 2023/08/09 2023/08/09 Tshwane (GTP) Standard 60 0.83 5 5 3.0 1219.1 1224.1 Analysis
1 2023 Menlo Open Tournament (F) 2023/07/22 2023/07/22 Tshwane (GTP) Standard 60 0.83 5 5 3.0 1200.0 1200.0 Analysis
Game History
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 38 21 3 14 22.5 59.2 78.3 1196.7 1275.0
White 21 11 2 8 12.0 57.1 60.7 1192.5 1253.2
Black 17 10 1 6 10.5 61.8 100.0 1201.8 1301.8
Standard All 38 21 3 14 22.5 59.2 78.3 1196.7 1275.0
White 21 11 2 8 12.0 57.1 60.7 1192.5 1253.2
Black 17 10 1 6 10.5 61.8 100.0 1201.8 1301.8
Rapid All 0 0 0 0 0.0 0.0 0.0 0.0 0.0
White 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Black 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Blitz All 0 0 0 0 0.0 0.0 0.0 0.0 0.0
White 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Black 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Colour Games Wins Draws Losses Score % Dp Aor Perform
Main All 74 44 3 27 45.5 61.5 97.6 1213.3 1310.9
White 37 21 2 14 22.0 59.5 80.4 1208.5 1288.9
Black 37 23 1 13 23.5 63.5 114.9 1218.0 1332.9
Standard All 69 40 3 26 41.5 60.1 86.2 1214.8 1301.0
White 35 20 2 13 21.0 60.0 85.0 1210.2 1295.2
Black 34 20 1 13 20.5 60.3 87.5 1219.6 1307.1
Rapid All 5 4 0 1 4.0 80.0 255.0 1192.1 1447.1
White 2 1 0 1 1.0 50.0 0.0 1179.5 1179.5
Black 3 3 0 0 3.0 100.0 425.0 1200.6 1625.6
Blitz All 0 0 0 0 0.0 0.0 0.0 0.0 0.0
White 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Black 0 0 0 0 0.0 0.0 0.0 0.0 0.0
Top 20 opponents most often played
#Chess SA idNameGamesScoreWinsDrawsLosses%AorDpPerformView
1 1170149169 Barkhuizen, R (Reuben) 4 3.0 3 0 1 75.0 1262.3 212.5 1474.8 View list
2 1160147672 Rocher, G (Gideon) 4 1.0 1 0 3 25.0 1222.4 -212.5 1009.9 View list
3 1170157329 Roberts, M (Marthinus) 3 2.0 2 0 1 66.7 1228.8 141.7 1370.5 View list
4 1160148677 Roos, B (Benjamin) 3 1.5 1 1 1 50.0 1274.6 0.0 1274.6 View list
5 1160157441 Swart, E (Eben) 3 1.0 1 0 2 33.3 1281.9 -141.7 1140.2 View list
6 2160161729 Nawrattel, A (Abigail) 2 2.0 2 0 0 100.0 1251.6 425.0 1676.6 View list
7 1170162033 Sahoo, S (Shaurya) 2 2.0 2 0 0 100.0 1251.6 425.0 1676.6 View list
8 2170157446 Snyman, M (Margaux) 2 2.0 2 0 0 100.0 1276.6 425.0 1701.6 View list
9 2160162781 Westermann, Z (Zelri) 2 2.0 2 0 0 100.0 1251.6 425.0 1676.6 View list
10 1160153451 Fredericks, M (Matai) 2 0.0 0 0 2 0.0 1226.9 -425.0 801.9 View list
11 1150147659 Du Toit, W (Wilco) 1 1.0 1 0 0 100.0 1353.2 425.0 1778.2 View list
12 2140304567 De Wet, N (Nina) 1 1.0 1 0 0 100.0 1334.2 425.0 1759.2 View list
13 2140304566 De Beer, M (Marielle) 1 1.0 1 0 0 100.0 1334.2 425.0 1759.2 View list
14 1150147657 Danzfuss, E (Edrich) 1 1.0 1 0 0 100.0 1359.2 425.0 1784.2 View list
15 2160150926 Fredericks, B (Bethany) 1 1.0 1 0 0 100.0 1334.2 425.0 1759.2 View list
16 1150147661 Fourie, M (Marchant) 1 1.0 1 0 0 100.0 1359.2 425.0 1784.2 View list
17 1130137398 Geyer, J (Ju-Han) 1 1.0 1 0 0 100.0 1309.9 425.0 1734.9 View list
18 2160143809 Gerber, Z (Zoe) 1 1.0 1 0 0 100.0 1334.2 425.0 1759.2 View list
19 1160158379 Gauche, K (Kian) 1 1.0 1 0 0 100.0 1200.0 425.0 1625.0 View list
20 1160152741 Botha, M (Marloux) 1 1.0 1 0 0 100.0 1234.8 425.0 1659.8 View list